467 results about "Total internal reflection" patented technology

Disclosed herein is a waveguide-based display comprising: a waveguide, a source of image modulated light projected over a field of view; an input coupler for coupling said light into a total internal reflection (TIR) path within the waveguide; and a grating structure for providing beam expansion of the TIR light in at least one direction and extracting the TIR light from the waveguide. The grating structure may include a plurality of grating elements having at least two different grating prescriptions and at least one surface relief grating formed by a phase separation process.

The invention provides a spatial light modulator, a self-checking device thereof and a light computing device, and relates to the technical field of optical modulation.The spatial light modulator comprises an incident waveguide structure, a covering plate, a liquid crystal layer, a substrate and an emergent waveguide structure; the incident waveguide structure is optically coupled with the cover plate and is used for guiding externally incident laser into the cover plate at a preset angle; the covering plate is used for enabling laser to be propagated in the covering plate in a total reflection form; the substrate bears the liquid crystal layer, integrates the driving circuit and is used for applying regulation and control voltage to the liquid crystal layer; the liquid crystal layer is arranged on the lower side of the covering plate and used for conducting phase modulation on the laser transmitted to the liquid crystal layer in a total reflection mode in response to the regulation voltage. And the emergent waveguide structure is optically coupled with the covering plate and is used for guiding the laser modulated by the liquid crystal layer out of the covering plate to a free space. According to the spatial light modulator, efficient spatial modulation and accurate control of the light field are realized, so that the integration and function accuracy of the spatial light modulator in self-inspection and light calculation are improved.

An optical device (201) comprises a center portion (203) and a reflector portion (204) surrounding the center portion and comprising a reflector surface (205) configured to provide total internal reflection. The center portion comprises a first lens section (206) and a second lens section (207) after the first lens section in a propagation direction of light. A projection of a light ingress surface (208) of the first lens section on a geometric plane (xy) perpendicular to a geometric line (z) through center of mass points of the first and second lens sections is smaller than a corresponding projection of a light ingress surface (210) of the second lens section on the geometric plane. As there are the two successive lens sections, a desired collimation effect can be achieved even if the lens sections are sufficiently thin from the viewpoint of manufacturing.

The application provides an optical device and a near-eye display device. The optical device comprises a light guide and a reflecting surface. The reflecting surface is arranged obliquely relative to two parallel total internal reflection surfaces of the light guide to couple light into the light guide. First and second ends of the reflecting surface are arranged on opposite sides of the first total internal reflection surface. The first and second ends of the reflecting surface satisfy the following conditions: light within an incident angle range enters the optical device through the light incident end, is reflected by the reflecting surface once to the second total internal reflection surface, and spreads in the light guide; and edge light within the incident angle range that is incident obliquely to the second end of the reflecting surface is reflected by the reflecting surface twice and then reflected to a space between the first end of the reflecting surface and the first total internal reflection surface. By arranging the reflecting surface obliquely relative to the first total internal reflection surface, at least 50% of light within a maximum incident angle range is spread in the light guide and stray light is filtered, thereby improving the effect of the light guide in display implementation of the near-eye display.

An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.

The present invention provides a compact optical device for augmented reality, the compact optical device including: an optical means configured to transmit at least part of real object image light therethrough toward the pupil of an eye of a user; a first reflective unit disposed inside the optical unit and configured to transfer augmented reality image light which is image light corresponding to an image for augmented reality output from an image output unit to a second reflective unit; and the second reflective unit disposed inside the optical means and configured to transfer the augmented reality image light transferred from the first reflective unit toward the pupil of the eye of the user by reflecting it, thereby proving an image for augmented reality to the user.

The spreadlight lens of the court lamp comprises a lens substrate applied to a lamp, a plurality of lenses are arranged on the lens substrate in a protruding mode, the two ends of each lens are the incident end and the emergent end respectively, and the emergent end is divided into a first light-transmitting body and a second light-transmitting body from top to bottom. Wherein the back face of the first light-transmitting body sinks inwards to form a light inlet cavity used for containing a light source, a reflecting groove is formed in the back face of the first light-transmitting body, a reflecting face is arranged on the side wall, close to the light inlet cavity, of the reflecting groove, and the reflecting face is used for reflecting light rays projected to the reflecting face through the light inlet cavity. The convex light-transmitting bodies are arranged on the lens, light rays emitted by a light source can enter the convex light-transmitting bodies to be refracted and diffused to be more uniform, meanwhile, the reflecting surfaces are arranged in the convex light-transmitting bodies, total reflection of the light rays entering the light-transmitting bodies can be achieved, light waste is reduced, and glare is reduced.

The invention provides a Micro-LED-based optical interconnection chip and a packaging method, and relates to the field of chips, the Micro-LED-based optical interconnection chip comprises N optical modules, each optical module comprises an SoC chip, a light emitting unit and a light receiving unit, the light emitting unit and the light receiving unit are arranged on the SoC chip, and lenses are arranged on the light emitting unit and the light receiving unit respectively; the first substrate is provided with a through groove, each optical module is electrically connected with the first substrate, and the light emitting unit and the light receiving unit are located in the through groove; the back surface of the second substrate is provided with a waveguide structure, the waveguide structure comprises a plurality of waveguide blocks, the end part of each waveguide block is provided with a total internal reflection mirror TIR, and the light emitting unit on one SoC chip reflects light to the light receiving unit on another SoC chip adjacent to the SoC chip through the total internal reflection mirror TIR so as to realize signal transmission of the adjacent SoC chips. The Micro-LED array can become an ideal scheme for short-distance optical communication by virtue of the advantages of parallel architecture, ultra-low power consumption and high stability.

The present disclosure provides a system and a method to deliver (irradiate) energy and defrost the surface of a glazing that does not require printed conductors, embedded wires, bus bar or conductive film. The present disclosure uses the optical phenomenon known as Frustrated Total Internal Reflection (FTIR) to deliver light energy directly to a surface of at least one glass layer of a windshield, glazing or other transparent substrate by means of high intensity light. The light is injected into the surface of at least one glass layer of the glazing at an angle that allows for light propagation via Total Internal Reflection (TIR). The light energy can be used as the sole source of energy or be complementary to a conductive coated resistive heated circuit and / or hot air blowing system.

A light detection and ranging (LIDAR) sensor system includes a window, a laser source configured to generate a beam, one or more scanning optics configured to output the beam through the window, and a sensor. The sensor includes at least one light emitter configured to output light associated with a parameter different than a corresponding parameter of the beam, a first optic coupled to the window, the first optic configured to receive the light from the light emitter and provide the light into the window to undergo total internal reflection in the window, a second optic coupled to the window, the second optic configured to receive the light provided into the window by the first optic, and a detector configured to receive the light from the second optic and output a signal indicative of a presence of an obscurant on the window.

An optical waveguide device and a preparation method therefor, and a near-eye display device. The optical waveguide device (1) comprises at least one optical waveguide (10). The optical waveguide (10) comprises: a waveguide sheet (11), which is used for making light beams transmit in the waveguide sheet (11) in a total reflection manner, wherein the waveguide sheet (11) has a coupling-in region (B) and at least two coupling-out regions (A); a coupling-in grating (12), which is arranged in the coupling-in region (B) and is used for coupling the light beams into the waveguide sheet (11); and at least two coupling-out gratings (13), which are correspondingly arranged in the at least two coupling-out regions (A) on a one-to-one basis, and are used for coupling out the light beams, which are transmitted in the waveguide sheet (11) in a total reflection manner, wherein the light intensities of the light beams coupled out by the at least two coupling-out gratings (13) are identical. The present application can improve the exit pupil uniformity of the optical waveguide device (1), thereby improving the visual experience of users, and also reducing the research and development costs incurred by the use of masks and the impact caused by diffraction effects.

A pupil-replicating waveguide usable in a VR display may have a slab of transparent material, an input grating coupler supported by the slab at the center of the slab, with output gratings supported by the slab and surrounding the input grating coupler. The input grating coupler couples image light into the slab, which propagates in the slab by total internal reflections. The out-coupling grating or gratings spread the image light all around the input grating, providing a wide beam of image light illuminating the eyebox of the VR display.

The present application relates to an optical arrangement, a lamp, a vehicle and a method for manufacturing an optical arrangement, wherein the optical arrangement comprises a light source section capable of emitting a light beam; a total internal reflection lens comprising a central section and a side wall of the total internal reflection lens arranged around the central section on the circumference of the central section, the side wall comprising a total internal reflection surface, the central section corresponding to a light entry section of the total internal reflection lens and receiving the light beam emitted by the light source section, the total internal reflection surface comprising at least a first total internal reflection surface arranged at a first circumferential position on the circumference of the central section and a second total internal reflection surface arranged at a second circumferential position on the circumference of the central section;wherein the first total internal reflection surface corresponds to a first boundary region of a target light pattern boundary, and the second total internal reflection surface corresponds to a second boundary region of the target light pattern boundary, wherein a discontinuous structure is provided between the first total internal reflection surface and the second total internal reflection surface; comprising a modeling surface that provides a light-emitting surface for the optical arrangement.

An illumination apparatus is provided to correct for chromatic aberration. A light-emitting diode (LED) structure has multiple LED clusters and an optic associated with each cluster. Each cluster is disposed in a cavity in a different total internal reflectance (TIR) structure. Each cluster contains individual LEDs that are configured to emit light of a different color toward the optic. In each cluster: a center of at least one LED within the cluster is disposed at a different distance from a center of the cluster than a center of at least one other LED within the cluster dependent on a wavelength dependence of the optic. For each color, an average position of the LEDs configured to emit the color within the clusters and an average position of the LEDs configured to emit each other color within the clusters are identical.

This invention discloses a diffractive waveguide and its design method. The diffractive waveguide includes a waveguide substrate and a coupling-in region and a coupling-out region disposed on at least one side of the waveguide substrate. A beam of light projected from an image source is coupled into the waveguide substrate through the coupling-in region and transmitted to the coupling-out region by total internal reflection. The second coupling-out region of the coupling-out region includes multiple coupling-out sub-regions. At least two coupling-out sub-regions are filled with one-dimensional gratings with different grating directions to satisfy the requirement of pupil expansion and coupling-out of the beam through the second coupling-out region. The one-dimensional grating filled in the first coupling-out region of the coupling-out region has the same grating vector as one of the one-dimensional gratings in the coupling-out sub-regions to increase the coupling-out of edge rays and compensate for the coupling-out energy at the edges. Furthermore, the sum of the grating vectors of the one-dimensional gratings in the coupling-in region and the one-dimensional gratings in the coupling-out region is set to zero, so that the beam can be effectively coupled into the waveguide substrate and coupled out without dispersion, effectively improving the visual imaging effect of the diffractive waveguide.

This application discloses a method and system for synchronous testing of metasurface grating waveguide performance, relating to the field of metasurface grating technology. The method includes polarization state modulation and spatial frequency encoding of multi-wavelength incident beams to obtain a modulated incident light field; coupling this modulated incident light field into the metasurface grating waveguide under test, which then undergoes total internal reflection to form the outgoing light field; acquiring a raw dataset of the entire light field, including Stokes polarization images and spatial spectrum images corresponding to each wavelength of the outgoing beam; calculating the total internal reflection hop count based on the Stokes polarization image; calculating the spatial step size offset based on the spatial spectrum image; and establishing a mapping relationship between the image pixel coordinates of the raw dataset and the internal physical regions of the metasurface grating waveguide under test to obtain local diffraction efficiency distribution data. This application solves the problem that traditional outgoing end intensity testing is difficult to trace to local defects inside the waveguide, achieving synchronous, high-precision quantitative characterization of local diffraction efficiency across multiple wavelengths.

The application relates to an illumination assembly for an endoscope and a parameter determination method of the illumination assembly. The illumination assembly comprises a cone part and a lens part which are integrally formed; the cone part comprises a large-diameter end and a small-diameter end; the light-out surface of the lens part comprises a total reflection surface and a refraction surface; the large-diameter end of the cone part is connected with the light-out surface of a light guide beam, and the small-diameter end of the cone part is connected with the lens part; the emergent light of the light guide beam is incident into the cone part from the large-diameter end, is converged and the beam angle is adjusted in the cone part, is then emitted from the small-diameter end, enters the lens part, and a part of the light beam incident into the lens part reaches the light-out port of the illumination assembly after total internal reflection on the total reflection surface, and another part reaches the light-out port of the illumination assembly after refraction on the refraction surface. The problems that the light cannot be considered in terms of uniform distribution and large-angle illumination in the coupling and transmission process of the existing endoscope illumination assembly are solved.

To provide a display device capable of switching an infinity mirror image to a non-display state, the display device comprises: a liquid crystal display (120); a semi-transmissive plate (150) arranged on the back side of the liquid crystal display; a total internal reflection mirror (140) arranged on one side opposite the liquid crystal display with respect to the semi-transmissive plate and positioned at a distance from the semi-transmissive plate; and a light source (160) having a central light emission axis directed toward the semi-transmissive plate or the total internal reflection mirror and emitting light into an area between the semi-transmissive plate and the total internal reflection mirror.

The invention provides an optical waveguide and a near-to-eye display device. The optical waveguide comprises a light guide part, a relay module arranged on the light guide part and a coupling-out module. Wherein the relay module is used for coupling light rays propagated by total internal reflection in the light guide piece to the coupling-out module; the light guide device further comprises an extinction device arranged on the light guide part, the extinction device at least comprises a first extinction device, and the first extinction device is used for absorbing one-dimensional emergent light transmitted by the relay module. Wherein the ratio of the refractive index of the first extinction device to the refractive index of the light guide part is within a set threshold value, and extinction particles are doped in the first extinction device. According to the technical scheme, the extinction device is arranged on the light guide part to eliminate the one-dimensional emergent light transmitted by the relay module, so that stray light in the light guide part is reduced, and the display effect of the near-to-eye display device is improved.

The invention provides an optical device and a near-to-eye display device. The optical device comprises a light guide part and a reflecting surface, the reflecting surface is obliquely arranged relative to the two parallel total internal reflecting surfaces of the light guide part so as to couple the light into the light guide part. The first end and the second end of the reflecting surface are respectively arranged on two opposite sides of the first total internal reflecting surface; and the second end of the reflecting surface meets the condition that edge light which is obliquely incident to the second end of the reflecting surface within the incident angle is reflected twice by the reflecting surface and then is reflected between the first end of the reflecting surface and the first total internal reflecting surface. The reflecting mirror is obliquely arranged relative to the first total internal reflection surface, so that light rays entering the light guide part can be reflected between the first total internal reflection surface and the second total internal reflection surface for propagation, and meanwhile, stray light secondarily reflected by the reflecting surface can be filtered through the arrangement of the first end and the second end of the reflecting surface; therefore, the optical performance of the optical device is improved, and the near-eye display effect of the light guide part is improved.

A multi-color LED illumination device and specifically a lens comprising a cylindrical opening extending into the lens from a light entry region at which one or more LEDs are configured. A concave spherical surface extends across the entirety of the light exit region of the lens, and a TIR outer surface shaped as a CPC extends between the light entry region and the light exit region. There are various diffusion surfaces placed on the sidewall surface of the cylindrical opening, as well as its upper planar surface and the exit surface of the lens. Lunes can also be configured on the sidewall surfaces of the cylindrical opening. The combination of lunes, diffusion elements, and the overall configuration of the lens provides improved color mixing and output brightness using three interactions in a first portion of light and two interactions in a second portion of light. Those interactions includes two refractions either with an intermediate reflection or not, all of which are necessary to achieve the improved performance of the multi-color LED illumination device and lens hereof.

The present invention relates to an emitter having at least one light source and a lens for shaping a beam for illuminating a target area. According to the invention, the lens has a through opening for allowing passage of an unreflected and undeflected direct light beam, on the input side of which the light source is positioned, wherein an inner circumferential surface enclosing said through opening at least partially forms a light entrance surface of the lens, at which some of the light rays emitted by the light source enter the lens, and are deflected by the lens by way of total internal reflection and are emitted as an indirect light beam from a light exit surface, wherein said inner circumferential surface is contoured in such a way that Fresnel reflections occurring at said inner circumferential surface are emitted through said through opening and illuminate the target area as part of the direct light beam and / or of the indirect light beam.

The invention relates to an optical film with multiple periodic gratings, and belongs to the technical field of optical devices, the optical film comprises a grating arranged above a waveguide, and the side surface of the waveguide is provided with a photoelectric sensor; the grating comprises grating structures of multiple periods, the grating structure of each period corresponds to one incident angle range, and when incident light incident in the specific incident angle range is diffracted by the corresponding grating structure and then enters the waveguide, total reflection is met in the waveguide; the grating structures are arranged according to the period size, and any two adjacent grating structures meet the condition that the incident angle upper boundary corresponding to the grating structure with the large period is not smaller than the incident angle lower boundary corresponding to the grating structure with the small period; the photoelectric sensor is used for receiving diffracted light propagating in the waveguide. According to the optical film, diffraction light meeting total reflection in the waveguide is generated through the gratings with the corresponding periods for working wavelengths at different angles, the incident angle range is enlarged, and the effect that the incident working angle is continuous is achieved.

A touch sensing device is provided, comprising a top plate associated with multiple light sources and a base plate having one or more associated detectors for detecting light propagated within the base plate, wherein light from the multiple light sources propagates within the top plate by total internal reflection. The top plate and base plate are configured such that when an external object touches the first surface of the top plate, light is coupled from the second surface of the top plate to the base plate via the first surface of the base plate. The multiple light sources are arranged in linearly extending recesses within the second surface of the top plate, and light from the multiple light sources is coupled to the top plate via the walls of the recesses. The multiple light sources form a linear array within the linearly extending recesses.

Optical system (1) comprising a primary optical sensor (3) which is protected against environmental influences by an optically transparent protective cover (2), wherein the optical system (1) comprises a contamination detection system (4), wherein the contamination detection system (4) comprises at least one optical transmitting unit (5, 6) and at least one optical receiving unit (7, 8), wherein a first transmitting unit (5) is configured to couple a first light signal into the protective cover (2) in such a way that the first light signal propagates in a directed manner with at least one total internal reflection within the protective cover (2) on a first propagation path (9), wherein a first receiver unit (7) is configured to couple out and receive the first light signal from the protective cover (2) at one end of the first propagation path (9), wherein the contamination detection system (4) is configured to detect contamination (11) on a surface of the protective cover (2) along the first propagation path (9) by comparing the first light signal received by the first receiver unit (7) with an expected first light signal, wherein the optical system (1) is configured such that by rotating and / or shifting the contamination detection system (4) the first propagation path (9) within the protective cover (2) is shifted and / or rotated so that the contamination detection system (4) detects contamination (11) along the surface of the protective cover (2) swept by the first propagation path (9); characterized by the fact that the contamination detection system (4) comprises a second optical transmitting unit (6) and a second optical receiving unit (8) which, according to the first propagation path (9), form a second propagation path (10) through the protective cover (2) by means of a second light signal, wherein the second propagation path (10) differs from the first propagation path (9).

The invention discloses AR glasses, which comprise a glasses frame, an optical machine and a waveguide, and is characterized in that the optical machine is used for outputting image light; the waveguide is installed on the mirror frame, a coupling-in area and a coupling-out area are arranged on the waveguide, and the image light is coupled into the waveguide through the coupling-in area, is totally reflected in the waveguide, is transmitted to the coupling-out area and is coupled out through the coupling-out area; wherein the light machine is arranged on one side, close to the nose bridge, of the glasses frame, and is configured to project the image light to the coupling-in area; compared with the prior art, the scheme can optimize the optical machine layout and improve the structural reliability.

The present invention discloses a total internal reflection wafer inspection device, comprising a camera, a laser, a reflective prism, a circular aperture, a support column, and a refractive cone. Upon entering the reflective prism, the laser changes its direction to be vertically upward. A circular aperture is provided on the vertically upward laser light path, blocking the center portion of the laser to form a ring-shaped laser beam. The ring-shaped laser beam is refracted by the refractive cone into the interior of the wafer to be inspected, where it undergoes total reflection. When it encounters internal defects or surface dirt on the wafer, the dirt is scattered out of the wafer and detected by the camera. The support column is located between the refractive cone and the circular aperture, and the wafer to be inspected is placed on the refractive cone. The camera is located above the wafer to be inspected. The refractive cone has a cone angle #imgabs0#, which ensures that the reflection angle #imgabs1# of the refracted light entering the wafer to be inspected is greater than the total reflection angle. Advantageously, the device of the present invention allows laser light to enter the wafer and undergo total reflection detection from the center to the outer ring of the wafer, achieving higher efficiency and detection accuracy than methods that detect from the edge of the wafer.

This invention provides a high-refractive-index adhesive layer for photovoltaic cells, its preparation method, and its application. The raw materials for this high-refractive-index adhesive layer include at least one polymerizable monomer and at least one fluorescent agent. The refractive index of the high-refractive-index adhesive layer is 1.50~1.67, and the center wavelength of the emitted light is greater than the center wavelength of the absorbed light; furthermore, the difference between the center wavelengths of the emitted and absorbed light is ≥60 nm. By controlling the refractive index of the high-refractive-index adhesive layer, this invention can effectively enhance the light-harvesting efficiency of photovoltaic cells. Furthermore, the portion of fluorescence emitted by the fluorescent agent in the adhesive layer that escapes will be re-entered into the cell due to total internal reflection between the adhesive layer and the first encapsulation film layer, thereby improving the utilization rate of fluorescence.

To provide a workpiece detection device capable of detecting translucent workpieces with a relatively simple configuration. [Solution] The detection device A10 comprises a reference surface 311, a reference axis N, a light-emitting unit 411, and a light-receiving unit 511. The light-emitting unit 411 and the light-receiving unit 511 are located on opposite sides of each other with the reference surface 311 in between, and are also located on opposite sides of each other with the reference axis N in between in a virtual cross-section S that includes the reference axis N in its plane. When a translucent workpiece 80 is on the reference surface 311, the light emitted from the light-emitting unit 411 enters from a first region 831 of the end face 83 of the workpiece 80, undergoes total internal reflection at the interface between the workpiece 80 and the outside air, and then exits from a second region 832 of the end face 83 of the workpiece 80 without reaching the light-receiving unit 511. When the workpiece 80 is not on the reference surface 311, the light emitted from the light-emitting unit 411 reaches the light-receiving unit 511.

An edge-lit waveguide illumination system with a thin, flexible layer of optically transmissive material designed for guiding light through optical transmission and total internal reflection. The system features a randomized two-dimensional pattern of discrete cavities formed on its back surface, and an array of linear cylindrical lenses on its front surface. Light is emitted by a plurality of LEDs positioned along a light input edge. A sheet of reflective material is positioned coextensively on the back surface. At least one cavity features a curved wall with a specific angle. Additional components may include a photoresponsive layer, a heat-dissipating metallic substrate with side-emitting LEDs, and optical adhesives or encapsulants. The system may also incorporate luminescent centers and / or a light-diffusing layer for altering light characteristics.